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1 #
2 # Copyright (c) 2011 The Chromium OS Authors.
3 #
4 # SPDX-License-Identifier:      GPL-2.0+
5 #
6
7 # This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is
8 # enabled. See doc/README.fdt-control for more details.
9
10 DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%)
11 ifeq ($(DEVICE_TREE),)
12 DEVICE_TREE := unset
13 endif
14
15 DTB := arch/$(ARCH)/dts/$(DEVICE_TREE).dtb
16
17 quiet_cmd_copy = COPY    $@
18       cmd_copy = cp $< $@
19
20 $(obj)/dt.dtb: $(DTB) FORCE
21         $(call if_changed,copy)
22
23 targets += dt.dtb
24
25 $(DTB): arch-dtbs
26         $(Q)test -e $@ || (                                             \
27         echo >&2;                                                       \
28         echo >&2 "Device Tree Source is not correctly specified.";      \
29         echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'";          \
30         echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument";  \
31         echo >&2;                                                       \
32         /bin/false)
33
34 arch-dtbs:
35         $(Q)$(MAKE) $(build)=arch/$(ARCH)/dts dtbs
36
37 .SECONDARY: $(obj)/dt.dtb.S
38
39 obj-$(CONFIG_OF_EMBED) := dt.dtb.o
40
41 dtbs: $(obj)/dt.dtb
42         @:
43
44 clean-files := dt.dtb.S
45
46 # Let clean descend into dts directories
47 subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/sandbox/dts ../arch/x86/dts